Shopify troubleshooting, SaaS billing problems, Claude API enterprise integration challenges, PayPal business account setup issues — fast answers for 2026:
x-api-key: YOUR_KEY — not Authorization: Bearer. Enterprise proxies silently strip custom headers. Trace the full request chain before blaming the key or the model string.I'm PJ, a dev consultant based in Encinitas, North County San Diego. I debug Shopify troubleshooting failures, SaaS billing problems that silently kill API access, Claude API enterprise integration challenges that only break in production, and PayPal business account setup issues that block live payments — all week, every week. Text me what you're seeing and I'll tell you exactly what's wrong in one message.
Text PJ your error — free first answerWhen you update a Shopify app or rotate credentials, the HMAC secret used to sign webhook payloads changes. Your endpoint keeps validating against the old secret and every webhook silently fails. Fix: pull the new secret from your Shopify Partner dashboard and update your verification middleware. This is the root cause of 70% of Shopify troubleshooting calls I get.
App Bridge session tokens expire every 60 seconds and must be refreshed before each authenticated API call. Shopify Plus troubleshooting almost always finds this: the app works on first load, then breaks after a minute of idle. Fix: call getSessionToken(app) immediately before every fetch, not once at page load. Build a thin wrapper that auto-refreshes and never cache the token.
A failed payment or mid-month plan downgrade silently revokes API access. Anthropic, Twilio, and most SaaS providers return a vague 4xx with no billing context in the error body. Open your billing dashboard first — always. One expired card has burned more engineering hours than any code bug I've seen in 2026. Check billing before touching the integration.
Claude requires x-api-key: YOUR_KEY, not Authorization: Bearer YOUR_KEY. Enterprise API gateways, reverse proxies, and middleware layers silently rewrite or strip custom headers. Trace the request end-to-end with a debug interceptor and confirm the exact header survives every hop. Most Claude API enterprise integration challenges I see are this — not the key itself.
Troubleshooting PayPal business account setup issues almost always finds the account stuck in "limited" status: business not fully verified, IPN listener URL not confirmed, or sandbox credentials accidentally used in production. Check your Business Information page in PayPal, confirm your IPN URL returns 200, then generate fresh live API credentials. Don't reuse sandbox keys in prod — PayPal silently accepts them but all calls fail.
Claude 2 is retired. Any integration using claude-2, claude-2.0, or claude-2.1 in the model field will get a 404 or 400 with a confusing error. Update to claude-sonnet-4-6 or claude-opus-4-7. This is the single most common silent Claude API enterprise integration challenge I fix — the key works, the billing is fine, just the model string is stale.
I'm PJ in Encinitas. I debug Shopify troubleshooting failures, SaaS billing problems, Claude API enterprise integration challenges, and PayPal business account setup issues every week. Text me what you're seeing — most questions get a real answer in under five minutes, for free.
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